diff --git a/README.md b/README.md
index 8fe7d5d..1513c2d 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,11 @@
+[![Unmaintained as of 2017,](https://img.shields.io/maintenance/no/2016.svg)](https://github.com/jsmaniac/preexpanded/issues)
+
 preexpanded
 ===========
-README text here.
+
+This project was an attempt at making it possible to write efficient macros which produce code using other macros.
+The goal was to statically pre-expand parts the generated code within the generator, so that the produced code consists mostly of primitives (`let-values`, `if`, …), but can still be specified in a concise way (`let`, `cond`, …).
+
+To do this properly, one would need to consider the generated macros as source-to-source functions which can be partially applied.
+
+This attempt however only consisted in hard-coding the expanded form of a few common macros, in a way which could easily and efficiently be injected in the generated code.